Converting A/C to 134
My A/C is out. The clutch is froze and I don't know about the compressor. It is the original unit. (The car is totally original) I don't know if I should convert to 134 or try to keep it R12. Will i need to replace much? How original can I keep it looking. (cast iron compressor, etc) About what should it cost for the conversion? Any suggestions and advice is appreciated.